Mechanical coupler



FIG. 1 is a perspective view of a mechanical coupler design of the present invention;

FIG. 2 is a top plan view of the mechanical coupler of FIG. 1, which is a mirror image of the bottom plan view and left and right side views;

FIG. 3 is an end view of the mechanical coupler of FIG. 1;

FIG. 4 is a second end view of the mechanical coupler of FIG. 1; and,

FIG. 5 is a plan view of a hitch assembly incorporating the mechanical coupler of FIG. 1, with the hitch structure disclaimed.

In the drawings, the broken lines in FIGS. 5 depict a hitch assembly that forms no part of the claimed design. 

CLAIM The ornamental design for a mechanical coupler, as shown and described. 